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Uncovering the shell game with barcodes: diversity of meiofaunal Caecidae snails (Truncatelloidea, Caenogastropoda) from Central America

by: Egger, Christina; Neusser, Timea P.; Norenburg, Jon; Leasi, Francesca; Buge, Barbara; Vannozzi, Angelo; Cunha, Regina L.; Cox, Cymon J.; Jörger, Katharina M.

Publication date: 2020-9-16
Usage: Attribution 4.0 International
Topics: DNA taxonomy, marine biodiversity, meiofauna, molecular species delineation, Mollusca
Publisher: Pensoft Publishers
Collection: biodiversity
Contributor: Pensoft Publishers
Language: English
Rights: https://biodiversitylibrary.org/permissions
Rights-holder: Copyright held by individual article author(s).
Volume: 968
Item Size: 45.5M

Abstract: Caecidae is a species-rich family of microsnails with a worldwide distribution. Typical for many groups of gastropods, caecid taxonomy is largely based on overt shell characters. However, identification of species using shell characteristics is problematic due to their rather uniform, tubular shells, the presence of different growth stages, and a high degree of intraspecific variability. In the present study, a first integrative approach to caecid taxonomy is provided using light-microscopic investigation with microsculptural analyses and multi-marker barcoding, in conjunction with molecular species delineation analyses (ABGD, haplotype networks, GMYC, and bPTP). In total 132 specimens ofCaecumandMeiocerascollected during several sampling trips to Central America were analyzed and delineated into a minimum of 19 species to discuss putative synonyms, and supplement the original descriptions. Molecular phylogenetic analyses suggestMeioceras nitidumandM. cubitatumshould be reclassified asCaecum, and the genusMeiocerasmight present a junior synonym ofCaecum. Meiofaunal caecids morphologically resemblingC. glabrumfrom the Northeast Atlantic are a complex of cryptic species with independent evolutionary origins, likely associated with multiple habitat shifts to the mesopsammic environment.Caecum invisibileEgger & Jörger,sp. nov.is formally described based on molecular diagnostic characters. This first integrative approach towards the taxonomy of Caecidae increases the known diversity, reveals the need for a reclassification of the genusCaecumand serves as a starting point for a barcoding library of the family, thereby enabling further reliable identifications of these taxonomically challenging microsnails in future studies.
Addeddate: 2025-03-21 14:24:48
Bhl_virtual_titleid: 210914
Bhl_virtual_volume: v.968 (2020)
Call number: 10_3897_zookeys_968_52986
Call-number: 10_3897_zookeys_968_52986
Foldoutcount: 0
Genre: article
Identifier: uncoveringshell968egge
Identifier-ark: ark:/13960/s2z4b3cg20x
Identifier-bib: 10_3897_zookeys_968_52986
Identifier-doi: 10.3897/zookeys.968.52986
Ocr: tesseract 5.3.0-6-g76ae
Ocr_detected_lang: en
Ocr_detected_lang_conf: 1.0000
Ocr_detected_script: Latin
Ocr_detected_script_conf: 1.0000
Ocr_module_version: 0.0.21
Ocr_parameters: -l eng
Page_number_confidence: 85
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Page_range: 1-42
Pages: 42
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Possible copyright status: In copyright. Digitized with the permission of the rights holder.
Ppi: 300
Source: ZooKeys 968
Year: 2020